视觉测量中摄像机标定精度评估方法

摘要

In order to assess the accuracy of camera calibration results accurately , based on the evaluation method of the length of the chessboard grid , a method for evaluating the accuracy of camera calibration based on external parameters was proposed .The same group of images was calibrated twice by this method to obtain the world coordinate system in two different positions .The distance of ori-gins of two world coordinate system were found by using the calibration results , and was compared with the actual distance .The accura-cy of external parameters in calibration resules is described quite visually , and then the accuracy of camera calibration results is further evaluated.%为了准确地评估摄像机标定结果的精确程度，在基于棋盘格长度的评估方法的基础上，提出了基于外参数的摄像机标定精度评估方法。该方法通过对同一组图像分两次进行标定，得到两个不同位置的世界坐标系，利用标定结果求得这两个世界坐标系原点的距离并与实际的距离作比较，能够比较形象地描述标定结果中外参数的精确程度，进而评价摄像机标定结果的精确程度。